Abstract
The objective of this study is to describe aerodynamic effects on vehicle dynamics. In this paper, the formulations of aerodynamic characteristics presented in the previous report are applied to the longitudinal 4-degree-of-freedom model, and used to simulate two-dimensional motions with the typical parameters of a passenger car. It is shown from the results of numerical studies that the pitching and heaving motions change their transient response characteristics with speed under high-speed conditions. Moreover, the effects of aerodynamics on the longitudinal motions are estimated as apparent changes of the spring and damping constants of the front and rear suspension systems, respectively.
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